{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508116473",
    "entityType": "Track",
    "nonce": "0xe5c6bd70ec27e7eb2a5578ccbdf2eaec697bd577ba85225310853d72c366cb8e",
    "signature": "0x3743ee255c0a2ccfca98a5a425e48e164ab41a94ae2d0738b739d20030b898ec12989fe956df714044317dd3f44408786dbcd7bf8278dca657cc5cd9cacba17b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}